Arsipoda geographica Gómez-Zurita, 2010
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publication ID |
https://doi.org/ 10.1080/00222933.2010.499575 |
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persistent identifier |
https://treatment.plazi.org/id/117D87F8-350C-EF6F-FECB-B4449A39FEF1 |
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treatment provided by |
Felipe |
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scientific name |
Arsipoda geographica Gómez-Zurita |
| status |
sp. nov. |
Arsipoda geographica Gómez-Zurita sp. nov.
Type material
Holotype: one male, Nouvelle Caledonie : Prov. Sud, Mt Kouakoué 21°95.758′ S, 166°53.830′ E, 1315 m, 17 March 2008, J.A. Jurado-Rivera leg. Voucher no. (specimen
mm
0.2
B
and DNA): IBE-JGZ-1022. Paratypes: two females, same data as holotype. Voucher nos.: IBE-JGZ-1056, IBE-JGZ-1057. The holotype will be deposited at the Musée National d’Histoire Naturelle (Paris, France) , one paratype at the Naturhistoriske riksmuseet (Stockholm, Sweden) and the other paratype at the Institut de Biologia Evolutiva ( CSIC, Barcelona, Spain) .
Description
Habitus ( Figure 4A View Figure 4 ). Body elongate oval, 2.9–3.1 mm long (holotype: 2.9 mm) and 1.3–1.4 mm wide (holotype: 1.3 mm); dorsally brown testaceous, darker at four apical antennal segments, behind eyes, disc and antebasal transverse furrow of pronotum, sutural area, basal margin, rows of punctures and lateral declivity of elytra, and epipleura; anterior head parts (except labrum), mouth pieces and legs dirty pale yellow. Winged species.
Head. Frons microreticulated, densely and finely punctured, slightly depressed as weakly impressed furrow near dorsal margin of eye, bearing single erect seta medially on furrow; separated from clypeus by obsolete broadly U-shaped impression. Postantennal tubercles obsolete. Interantennal space weakly convex, slightly rugose, 1.57 × wider than longitudinal diameter of antennal socket. Eyes large, convex, almost round (1.22 × longer than wide). Clypeus almost smooth, depressed laterally; anteriorly slightly concave, with transversal row of eight very fine, translucent setae. Labrum semicircular, almost smooth. Maxillary palpi elongated, elbowed at second segment; last segment elongated with rounded acuminated apex. Antennae relatively long, almost reaching midlength of elytra; two basal segments elongated ovoid; third segment and following slender, gradually expanding apically; third and fourth segments subequal, longer than second; five to seven segments longer than preceding, slender; eight to ten segments subtrapezoidal, rugose, densely pubescent; last segment with acuminated lancet-like apex.
Pronotum ( Figure 5 View Figure 5 ). Subtrapezoidal, slightly transverse (midlength: 0.60– 0.57 mm; 0.60 mm in holotype), convex, laterally sloping downwards more acutely at anterior half; anterior margin (0.77–0.83 mm wide; 0.77 mm in holotype) very finely bordered, slightly concave medially; sides weakly concave, strongly bordered; basal margin (0.90–1.03 mm wide; 0.97 mm in holotype) bi-sinuose, very finely bordered except medially on slightly protruding median convex lobe; anterior angles as obliquely elongated explanate rounded callus, dorsally and posteriorly with large setigerous pore bearing long seta obliquely bent backwards; posterior angles broadly rounded at right angle with median setigerous pore at margin bearing seta sublaterally bent forwards; surface of pronotum delicately microgranulose, with uniformly dense fine punctures, comparable to punctures on frons, finer at sides, bearing minute translucent setae on disc; relatively deep basal transverse and weakly sinuose furrow at about one-quarter of pronotal length, with both ends marked by fovea or small longitudinal folding. Proepisterna smooth, unpunctured, slightly concave. Prosternum long, anteriorly concave, unpunctured, with sparse fine yellowish setae; proepisternal suture oblique, deep; intercoxal process narrow between coxae, less than half diameter of coxae, broadly expanded laterally at broadly rounded apex, almost enclosing coxal cavities behind. Scutellum wider at base than longer, broadly rounded at apex, unpunctured, extremely finely rugose.
Elytra. Long (1.93–2.13 mm long; 2.03 mm in holotype; and 0.67–0.7 mm wide at middle; 0.67 mm in holotype), flattened at disc, evenly convex at lateral declivity, very slightly broader at base than pronotum basally; anterior angles broadly rounded, sides weakly convex towards broadly rounded apex; humeral calli convex, protruding; sides margined from humeral angle almost reaching sutural angle, with margin almost concealed from above, especially at apical third owing to lateral convexity of elytra; surface very finely microsculpted with delicate transverse microreticulation and sparse, minute, very weakly impressed punctures, sparsely covered with minute, very short translucent setae; surface regularly striate-punctate, with 10 longitudinal rows of regular dense, deeply impressed round punctures, except at apical angle, unordered and weaker; scutellar row short (10–12 punctures); rows 2–4 running from elytral base reaching almost elytral apex (second row almost converging with suture apically); rows 5 and 6 slightly sinuose basally running from base of elytra converging apically at middle of apical declivity of elytra; rows 7–10 starting behind smooth humeral calli, running parallel to elytral margin, gradually disappearing before apex; marginal bead of punctures present; interstriae convex, more so apically and laterally on elytra as weakly raised costae. Epipleura wide, biconcave, sloping downwards, so visible laterally; gradually but quickly narrowing apically before apical curvature of elytra; surface smooth, unpunctured; punctured all along external margin.
Ventral parts. Meso- and metasternal processes almost twice as wide as prosternal process; metaventrite smooth, glossy, with scattered fine punctures bearing short fine setae; longitudinally impressed medially; apical margin of each half sinuous, producing broadly triangular median emargination. Front and mid femora spindleshaped, uniformly sparsely covered by fine whitish setae; hind femora strongly swollen (ratio length: width = 1.69), wider near base because of strong dorsal expansion, gradually narrowing towards apex; front and mid tibiae straight, gradually widening to apex; hind tibiae curved, externally concave to fold over femora, considerably gradually expanded apically, dorsally excavated; first segment of protarsi and mesotarsi subtriangular, densely uniformly pubescent underneath, slightly expanded in male (holotype); second segment subtriangular, only apically pubescent underneath; third segment bilobed, broader than first segment, with long, dense yellowish setae ventrally; onychium long and slender, club-shaped; first segment of hind tarsi elongated, as long as three remaining segments together; claws appendiculate. In male (holotype), first abdominal segment long, weakly convex apically, with scattered punctures and fine whitish setae; three intermediate segments slightly concave apically, very finely transversely striate, with scattered whitish setae except at median longitudinal quarter; last visible ventrite largely concavely emarginated at apex, with whitish setae laterally and broadly denuded medially, longitudinally impressed medially by dark line. In females (paratypes), median longitudinal glabrous area of ventrites narrower; last visible ventrite not emarginated apically, regularly rounded, devoid of dark impression.
Reproductive organs. Aedeagus 3.8 × longer than broad medially (1.03 mm long, 0.27 mm wide); almost parallel-sided with weakly widened apical quarter; slightly
mm
0.5
curved, mostly basally, on lateral view, tapering at slightly dorsally bent apex; apex expanded as small (0.03 mm) semicircular projection; dorsal apical opening large, elongated oval; ventrally with median elongated depression ( Figure 6 View Figure 6 ). Spermatheca small (0.23 mm long), with basal part almost spherical, distally projecting an elongated neck ending at relatively short apical part, provided with darkened pointed appendix; ductus short, narrow, inserted slightly sideways to basal part and strongly recurved, with sclerotized part ending next and at midlevel of basal part ( Figure 3B View Figure 3 ).
Diagnosis
Because of its size, darker tint and costate elytra, this species could be confounded with A. agalma , but they can be distinguished by the lack of supraocular furrow in A. geographica Gómez-Zurita sp. nov., its finer punctation on frons and pronotum, and by the shape of aedeagus, with regularly rounded apex and elongated oval operculum, and that of spermatheca ( Figure 3 View Figure 3 ). In the key presented by Samuelson (1973), this species would be paired with A. shirleyae , with which it may also be confounded, in spite of this species being smaller (2.1–2.5 mm). They can be distinguished nevertheless by the shape of the basal antennal segments, with third segment not longer than fourth in A. geographica Gómez-Zurita sp. nov., the lack of elytral costae in A. shirleyae , and very clearly by the shape of the aedeagus (not apically expanded in A. geographica sp. nov.) and the spermatheca (spherical and not elongated basally, with U-shaped duct in A. geographica Gómez-Zurita sp. nov.).
Distribution
Endemic to New Caledonia.
Etymology
The species name is in recognition of the National Geographic Society, which sponsored the work in New Caledonia resulting in the discovery of this species.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.